t2.c

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#include"reg52.h"
//sbit P11=P1^1;
bit low=0;
void main()
{
//int i;
//unsigned char a[3];
T2CON=0x04;
ET2=1;
EA=1;
TL2=0x55;				 
TH2=0x55;
//i=0;
//P11=1;
while(1)
{
low=0;
if(low)
{
low=0;
//a[i]=RCAP2L;
//i++;
//a[i]=RCAP2H;
//i++;
//if(i==4)
//{
//i=0;
//a[0]=a[2]+256-a[0];
//a[1]=a[3]-a[1]-1;
//if(a[0]>256)
//{
//a[1]=a[1]+1;
//a[0]=a[0]-1;
//}
P0=0x01;//a[0];
P2=0x02;//a[1];
//}
}
}
}

void timer2() interrupt 5
{
EXF2=0;
low=1;
TF2=0;
}